{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3%2C+Cholecalciferol&page=19",
    "query": {
      "intervention": "Vitamin D3, Cholecalciferol",
      "page": 19
    },
    "page_size": 10
  },
  "pagination": {
    "page": 19,
    "page_size": 10,
    "total_count": 554,
    "total_pages": 56,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3%2C+Cholecalciferol&page=20&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D3%2C+Cholecalciferol&page=18&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-15T15:52:01.864Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01317940",
      "title": "Nutrition and Body Composition in Acute Lymphoblastic Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Precursor Cell Lymphoblastic Leukemia-Lymphoma",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D and Calcium Citrate",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Children's Hospital Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "29 Years",
        "sex": "ALL",
        "summary": "10 Years to 29 Years"
      },
      "enrollment_count": 76,
      "start_date": "2011-03",
      "completion_date": "2016-01",
      "has_results": true,
      "last_update_posted_date": "2020-07-08",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01317940"
    },
    {
      "nct_id": "NCT05522179",
      "title": "Nutritional Supplements and Foot Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Foot Injuries and Disorders"
      ],
      "interventions": [
        {
          "name": "NutraHeal",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "NutraHeal Plus",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "NutraHeal",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "20 Years to 80 Years"
      },
      "enrollment_count": 46,
      "start_date": "2022-08-29",
      "completion_date": "2023-07-30",
      "has_results": false,
      "last_update_posted_date": "2023-08-01",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 3,
      "location_summary": "Altoona, Pennsylvania • Ebensburg, Pennsylvania • State College, Pennsylvania",
      "locations": [
        {
          "city": "Altoona",
          "state": "Pennsylvania"
        },
        {
          "city": "Ebensburg",
          "state": "Pennsylvania"
        },
        {
          "city": "State College",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05522179"
    },
    {
      "nct_id": "NCT02676674",
      "title": "Vitamin D Levels Following Topical Application of Vitamin D Ointment",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Dose 1",
          "type": "DRUG"
        },
        {
          "name": "Dose 2",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 10,
      "start_date": "2016-03",
      "completion_date": "2017-06-15",
      "has_results": false,
      "last_update_posted_date": "2019-11-01",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Saint Paul, Minnesota",
      "locations": [
        {
          "city": "Saint Paul",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02676674"
    },
    {
      "nct_id": "NCT01545830",
      "title": "Metabolic Syndrome and Insulin Resistance at Allina",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Metabolic Syndrome"
      ],
      "interventions": [
        {
          "name": "vitamin D3 (cholecalciferol)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Allina Health System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 84,
      "start_date": "2012-03",
      "completion_date": "2014-03",
      "has_results": false,
      "last_update_posted_date": "2016-09-01",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01545830"
    },
    {
      "nct_id": "NCT03644212",
      "title": "Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Polycystic Ovary Syndrome",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Maimonides Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "48 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 48 Years · Female only"
      },
      "enrollment_count": 79,
      "start_date": "2012-07",
      "completion_date": "2013-10",
      "has_results": true,
      "last_update_posted_date": "2020-01-13",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Brooklyn, New York",
      "locations": [
        {
          "city": "Brooklyn",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03644212"
    },
    {
      "nct_id": "NCT00601328",
      "title": "Bioequivalency Study of Calcitriol Tablets Under Fasting Conditions",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Secondary Hyperparathyroidism",
        "Hypocalcemia"
      ],
      "interventions": [
        {
          "name": "Calcitriol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Roxane Laboratories",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 36,
      "start_date": "2003-07",
      "completion_date": "2003-08",
      "has_results": false,
      "last_update_posted_date": "2018-01-23",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Springfield, Missouri",
      "locations": [
        {
          "city": "Springfield",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00601328"
    },
    {
      "nct_id": "NCT04677816",
      "title": "Impact of Vitamin D Supplementation on the Rate of Pathologic Complete Response in Vitamin D Deficient Patients",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Triple Negative Breast Cancer",
        "Vitamin D Deficiency",
        "Invasive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Standard of Care Neoadjuvant Chemotherapy (NAC)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Drug Diary",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2021-10-22",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-28",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04677816"
    },
    {
      "nct_id": "NCT01911169",
      "title": "Vitamin D to Improve Endothelial Function in SLE",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Atherosclerosis",
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 9,
      "start_date": "2011-06",
      "completion_date": "2014-01",
      "has_results": true,
      "last_update_posted_date": "2017-10-27",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01911169"
    },
    {
      "nct_id": "NCT01736865",
      "title": "Vitamin D for Established Type 2 Diabetes (DDM2)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Type 2 Diabetes"
      ],
      "interventions": [
        {
          "name": "Cholecalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Tufts Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "25 Years to 75 Years"
      },
      "enrollment_count": 127,
      "start_date": "2012-12",
      "completion_date": "2015-08",
      "has_results": true,
      "last_update_posted_date": "2020-04-01",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01736865"
    },
    {
      "nct_id": "NCT01667796",
      "title": "Pharmacokinetics of Vitamin D in Multiple Sclerosis and in Health",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Multiple Sclerosis, Relapsing-remitting"
      ],
      "interventions": [
        {
          "name": "Vitamin D3",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 60 Years · Female only"
      },
      "enrollment_count": 57,
      "start_date": "2010-11",
      "completion_date": "2014-03",
      "has_results": true,
      "last_update_posted_date": "2019-03-05",
      "last_synced_at": "2026-10-15T15:52:01.864Z",
      "location_count": 2,
      "location_summary": "San Francisco, California • Baltimore, Maryland",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01667796"
    }
  ]
}